BS EN 62021-3 is a European Standard which is the third part of a multi-series that describes two procedures for the determination of the acidity of unused and used electrical non-mineral insulating oils. Method A is potentiometric titration and Method B is colourimetric titration.
The method may be used to indicate relative changes that occur in non-mineral insulating oil during use under oxidizing conditions regardless of the colour or other properties of the resulting non-mineral oil.
The acidity can be used in the quality control of unused non-mineral insulating oil.
Note 1: In unused and used non-mineral insulating oils, the constituents that may be considered to have acidic characteristics include organic acids, phenolic compounds, some oxidation products, resins, organometallic salts, and additives.
Note 2:The acidity results obtained by potentiometric test method may or may not be numerically the same as those obtained by colourimetric methods, but they are generally of the same magnitude.
BS EN 62021-3 on non-mineral insulating oils is relevant to:
Non-mineral insulating oil is an insulating liquid, not derived from petroleum crudes.
BS EN 62021-3 provides method A: automatic potentiometric titration, Method B: Colourimetric titration, apparatus, sampling, procedure, calculation of result and precision that ensures determination to check the quality of insulating oils.
If you are a manufacturer of insulating oils, BS EN 62021-3 is beneficial as it could result in improved characteristics such as optimized liquid cost, increased cooling performance, extended insulation life and reduced environmental impacts and make positive contributions to your product development initiatives.
EN 62021-3:2014
IEC 62021-3:2014